Jar closure



, MarchZ MELA. ngyvALD JAR CLOSURE' Filed May 12 1924 Patented Mar.l 24,1925,.

PATENT oFFlcE;

:EDWARD AJDE'WAIQD, 0F MASSlLLON, 0HI0- JAR cLosuaE.

sensationele@ May 12, ,1.ai24 seriali No. 112,694.

Owing totrequent irregularities. in this -flange, las well as in ,theedge of the screw cap, ditliculty is frequently experienced in obtainingyan air-,tight seal with the. us e of the usual screwcap; and the`moving con- .tatf the cdgeQf $119.11 a Qaptends tOcut 011 displace therubber packing ring.

The. object lof her present improvement isy to provide la .jar Hclosurevwhich eliminatesV ytheabovediiiicultiesand formswan .air-tight i i p `Arim 4 of .the mouth; and for sealing the ar,

seal betweellthe cover and theinout-h of the ljar ;V the closure, beingadapted to, be` applied to ,the ordinary Mason rjar without Vany changein the construction thereof. Ajfur- Y ther robject of the c improvementis to .pio vide .la closure which l.be easilyland .readily applied.. toQ1'. remordfrom the im' and which will -berltightlygretained place whenappledtotllejar- The above andA other ,objects .Zaremattafined by Y:providing` a p ara-)colicA Ispiral.grooveA havinga continuouspitch, inthe-top ofthe cover; and Y .by .providing Ufshapcd yoke ,hav-.ine l adiametri@ raiceway Containing. a ball adapted to operate in the spiralgroove `andfprovided vwith ,engagingjlangres upon itslegs -`adapted toengage under thexannu- Anembodiment of the inventionthus described in.general .terme l iSV illllstmted in the. accompanying drawfngan which-Eigure l1` Y is a vertical sectionalv view .of

y the upper l portion. ofg a Mason:` jar, I provided with .the ,improved@lesive Sharma .the lsaine;inthe illitiallP-QSitiOn; e

Fig. 2,v .a side elevation. of, theama .shwjmg the closure in theJlocked position;

Eig. 3, a topplan view ot' the, spirally l grooved cover;

4', a top plan view of the yoke; F ig. 5, a section Von the line 5-5,Fig. and Y Fig. 6, a transverse section through the yokeon the line(ST-6, Fig. 4.

-Similar numerals Irefer to similar parts throughoutthe drawing.

A l,Mason type of fruit jaris .illustrated at l and provided with theusual Vexteriorly threaded neck 2, having` the annular flange z3 belowthe threaded portion, and terminat- YKing VVIn,y anl annular rim. 4.surrounding the mouth 5. A rubber. packing ring (5 1s provided for suchjars, which is placed around the neck upon the flange B ,when anordinary screw cover 1s used.

The kpresent jar .closure includes the cover 5a which is preferablymolded glass having the Aannular boss-6a adapted to ye;-

tend'into the mouth of theijar to prevent lan air space between thecontents-'ofthe jar and the coveriand provided with the annular shoulder7 arranged to seatupon the the. ordinary rubber packing ring@isipreferably placed upon the rim and "terms a cushionrfor the'covershoulder. h

A parabolic spiralgroove 9 is formed in the top of the cover 5a, and, asbestshown soy in Fig. l, this groove .has a continuous inc linationfromk the periphery tothe middle voftheicover; the innerend ofthe'ugroove fbeingconsiderably v:higher than the outer A,crd thereof.

For the purpose v of .f clamping the cover upon the neck of the jar7 layoke 10,* preferably stamped fromv a s tripof openhearth Adrawnsteehisprovided. This yoke comy prisesthe central channelporti-on ll, theloewer edges of which are slightly inturned j rsatllto form ,anreceiverand retain the ball 13. Stop lugs 16 are formedat each endofthe ball race" to limit themovement .ofthe ball. inA each direction- YThe dependi ,ing leg ypoltflcnls ..14 'are Preferably ,flared in widthatftheirlower @nds andere providedv Y Yulivi-th the engaging4 L-.flanges15 preferably :concaved andad'zmted to engage and opers-ateiundertheannular. @flare-fe of the jar.

..fr @tears .17 @vided inthe@- gles at each side of the flange 15andarranged to substantially engage the periphery of the annular flange3 when the closure is in the clamped position, as shown in Figs. 2 and5.

For the purpose of strengthening the legs 14 of the yoke, a rib 18 isformed in each leg, terminating in the curved upper end 19, which mergesinto the body portion 10 of the yoke, and in the curved lower end 20extended beneath the flange 15. y

In placing the closure upon the jar, the glass cover 5aN is first placedover themouth of the jar, as shown in Fig. 1, the rubber ring 6 beinglocated between the annular shoulder 7 of the cover and the mouth of thejar.

The ball 13 is then moved to the end of the ball race 11 in the yoke,and the yoke is slipped sideways over the neck of the jar until itassumes a diametric position, as

' shown in Fig. 5, the ball. engaging the outer end portion of thespiral groove 9 in the cover.

It should be noted that, as shown in Fig. 1, when the yoke isfirstslipped over the neck of the jar, it is lowered, permitting theears 17 upon the leg flanges to pass beneath the annular flange 3 of thejar.

The yoke is then raised until the flanges Y 15 upon the legs thereofengage the under side of the annular flange 3 of the jar, the ears 17engaging the periphery of the annular flange 3, and preventing the yokefrom being displaced sideways. The yoke is then rotated around the neckof the jar in a direction to cause the ball 13 to travel toward theinner end of the spiral groove 9.

As the ball reaches the inner higher end of the spiral groove, as shownin Fig. 2, the cover will be tightly clamped upon the mouth of the jar,compressing the rubber ring 6 between the shoulder 7 of the cover andthe mouth 4 of the jar, forming an airtight seal at the `ioint.

The yoke will thus be frictionally held in clamped position, preventingaccidental turning movement of the same, while the ears 17 prevent sidemovement of the yoke with reference tothe j ar.

Due to the considerable length 0f the spiral groove in proportion to theslight inclination thereof toward the inner end, it is evident that therotation of the yoke causing the ball to travel toward the highest pointof the groove, develops the power to the maximum.

It will be understood that the form of the invention illustrated inintended to show the application of the improved cover upon a Mason jaras now in common use. However, it is intended that new jars manufacturedespecially for use with the improved cover will notl have the elongated,threaded neck. This will permit the cover to be provided withconsiderably shorter legs than illustrated, the construction beingotherwise the same as illustrated,

I claim 1. In combination with a jar having an annular flange around itsneck portion, a closure including a cover arranged to engage the mouthofthe and having a spiral groove in its upper face, a U-shaped yokeprovided with a raceway and having L- shaped legs forengagement with theflange upon the jar, anda ball in the raceway for operating in saidspiral groove.

2. In combination with a jar having an annular flange around its neckportion, a closure including a cover arranged to engage the mouth of thejar and having a spiral groove in its upper face, a U-shaped yokeprovided with a raceway and having flanged legs for engagement with theflange upon the jar, and a ball in the raceway fo-r operating in saidspiral groove.

3. In combination with a jar having an annular flange around its neckportion, la closure including a cover arranged to engage the mouth ofthe jar and having a spiral inclined groove in its upper face, a U-shaed yoke provided with a raceway and-having flanged legs for engagementwith the Harige upon the jar, and a ball in the raceway for operating insaid Spiralgroove.

4. In combination with a jar having an annular flange around its neckportion,'a closure including a cover arranged to engage the mouth of thejar and having a spiral inclined groove in its upper face, a U-shapedyoke provided with a raceway and having flanged legs fo-r engagementwith the flange upon the jar, a ball in the raceway for operating insaid spiral groove, and means for limiting the movement of the ball inthe raceway.

5. In combination with a Iiar having an annular flange around its neckportion, a closure including a cover arranged to engage the mouth of thejar and having a spiral inclined groovein its upper face, a U-shapedyoke provided with a raceway and having flanged legs for engagement withthe flange upon the jar, a ball in the raceway for operating insaidspiral groove, and means for preventing sideways displacement of theyoke.

6. In combination with a jar having an annular flange around its neckportion, a closure including a cover arranged to engage the mouth of thejarand having a spiral inclined groove in its upper face, a U-shapedyoke provided with a raceway and having flanged legs for engagement withthe ange upon the jar, a ball in the raceway for operating in saidspiral groove, and lugs upon the flanged legs of the yoke for engagementwith the periphery of the annular flange upon the jar. Y

7. In combination with a having an upon the jar, a ball in the racewayfor annular flange around its neck portion, a operating in said spiralgroove, and an anclosure including a cover arranged to engage nular bossupon the cover for insertion into 10 the mouth of the jai' and having aspiral the mouth of the jar. inclined groove in its upper face, aU-shaped In testimony that I claim the above, I have yoke provided Witha racevvay and having hereunto subscribed my nam-e. Y

'flanged legs for engagement with the flange EDWARD A. DEWALD.

